If only doing 4 miles or so a day, £3-400 should get you a..well...sorta alright car, used to have a renault 5 that cost me £450, lasted me 4 years fine, used to pass the MOT everytime too, so, possible you can get an alright one, tried the ex police cars? some of those go cheap too, usually really well looked after too servicewise (except the mileage ofc).

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